.index_bg{
  width: 100%;
  height: 600px;
  background: url(../../../assets/img/index_a.jpg) no-repeat 100%/100%;
  display: flex;
  flex-direction: row;
  justify-content: center;
}
.index_bg_cont,.index_bg_cont_left,
.index_bg_cont_right,.index_bg_cont_left h3,
.index_bg_cont_left h4,.index_bg_cont_text,
.index_bg_cont_text span{
  background: rgba(0, 0, 0, 0);
  /* opacity: 0; */
}
.index_bg_cont{
  width: 70%;
  height: 250px;
  /* border: 1px solid #ccc; */
  margin-top: 150px;
  display: flex;
  flex-direction: row;
}
.index_bg_cont_left{
  width: 50%;
  height: 100%;
  /* border: 1px solid #ccc; */
}
.index_bg_cont_right{
  width: 20%;
  height: 100%;
  margin-left: 30%;
  /* border: 1px solid #ccc; */
  position: relative;
}
.index_bg_cont_text{
  position: absolute;
  bottom: 0;
  height: 100px;
  width: 100%;
}
.index_bg_cont_text span{
  display: block;
  font-size: 18px;
  line-height: 50px;
  color: #ff7f21;
}
h3{
  font-size: 80px;
}
h4{
  font-size: 46px;
}
h3,h4{
  color: #fff;
  line-height: 88px;
  font-weight: 400;
}
/* ############################################main###################################### */
.index_main{
  width: 65%;
  padding: 50px 15%;
}
.index_main_nav ul{
  display: flex;
  flex-direction: row;
  align-items: center;
}
.index_main_nav ul div{
  margin: 0 15px;
  height: 80%;
  color: #999;
}
li{
  list-style: none;
  outline:none;/* 去除元素点击后的边框*/
}
.index_main_nav{
  padding: 40px 0;
}
.active_font{
  color: #ff7f21;
}
